In the margins of The 2023 Digital Government Summit convened in Brussels, the Lisbon Council launches The Interoperability Imperative: A Tale of Four Citiesa look at the coming breakthrough in digital government service provision and a reflection on the policy framework Europe will need to deliver it. Says Principal Author David Osimo, director of research a the Lisbon Council: “Interoperability sounds like a technical term –but it’s really the heart of what’s next and what Europe needs. The astonishing thing is so many European cities are already doing it. We look at four – Ghent, Kyiv, Milan and  Tallinn –  and analyse the novel solutions they produced and the results they delivered.”